Period 4 element
Videos
A period 4 element is one of the chemical elements in the fourth row of the periodic table of the chemical elements. The periodic table is laid out in rows to illustrate recurring trends in the chemic
Potassium 2
Calcium unter Argon Schutzgasatmosphäre
Polycrystalline germanium
Bromine 25ml
Alkali metal
Videos
The alkali metals consist of the chemical elements lithium, sodium, potassium, rubidium, caesium, and francium. Together with hydrogen they constitute group 1, which lies in the s-block of the periodi
Petalite, the lithium mineral from which lithium was first isolated
Johann Wolfgang Döbereiner was among the first to notice similarities between what are now known as the alkali metals.
Lepidolite, the rubidium mineral from which rubidium was first isolated
Spodumene, an important lithium mineral